Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Número de classificação estelar para 3 planetas de Netuno < 1 au
 ###Tabelas: CREATE TABLE eliminated_contestants'_weigh_in (eliminated_contestants'_weigh_in_id AUTO_INCREMENT PRIMARY KEY, Contestant VARCHAR, Starting Weight (kg) VARCHAR, Final Weight (kg) VARCHAR, Weight Lost (kg) VARCHAR, Percentage Lost VARCHAR, Position (out of Eliminated Contestants) VARCHAR) CREATE TABLE friendly (friendly_id AUTO_INCREMENT PRIMARY KEY, Match INT, Date VARCHAR, Competition or tour VARCHAR, Ground VARCHAR, Opponent VARCHAR, Score1 VARCHAR) CREATE TABLE junior_champions (junior_champions_id AUTO_INCREMENT PRIMARY KEY, Year INT, Men's singles VARCHAR, Women's singles VARCHAR, Men's doubles VARCHAR, Women's doubles VARCHAR, Mixed doubles VARCHAR) CREATE TABLE cities_and_towns (cities_and_towns_id AUTO_INCREMENT PRIMARY KEY, City VARCHAR, 2011 Estimate INT, 2010 Census INT, 2000 Census VARCHAR, County VARCHAR) CREATE TABLE sun-like_stars_with_hot_dust (sun-like_stars_with_hot_dust_id AUTO_INCREMENT PRIMARY KEY, Star VARCHAR, Stellar classification VARCHAR, Distance from Earth ( ly ) VARCHAR, Constellation VARCHAR, Dust (or Debris; Temperature (K) VARCHAR, System VARCHAR, Dust (or Debris) Location (AU) VARCHAR, Cool Dust > 10 AU VARCHAR, Stellar Age (Myr) VARCHAR)  
SELECT COUNT Stellar classification FROM sun-like_stars_with_hot_dust WHERE System = 3 Neptune planets < 1 AU